Welcome! My name isXXXXX am a UC Davis graduate, and currently, a Medical Director of a veterinary hospital.

I am sorry to hear about this concern for Barny.I have a Cavalier myself, and unfortunately, I lost my other Cavalier of 10 years of age 1 month ago due to severe heart disease.

With this type of breathing you are describing, it is critical to get into an emergency vet. I am greatly concerned about a serious lung problem or a complication from congestive heart failure.

Very sorry to hear Barny is not doing well. With a breathing issue, at this age, and for this breed, I would get him into an emergency vet. It's worth the trip.

Please let me know if there is anything I did not cover for you. I hope that information has been helpful.Please remember to select Reply to Expert, if for any reason you need further clarification, have more questions, or were expecting a different type of answer. Please, hold off providing your feedback rating until you have asked all your questions. Otherwise, I greatly appreciate your rating to close the question. My goal is to try and provide you the best answer possible. Dr. Andy

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

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